Sneh's age is 1/6th of her father's age. Sneh's father's age will be twice of Vimal's age after 10 years. If Vimal's eighth birthday was celebrated 2 years before, then what is Sneh's present age ?
Answer: D Vimal's present age = 8+2 = 10 year. Father's age after 10 years = (10+10)*2 = 40 years. Father's present age = 30 years. Sneh's present age = 1/6 * 30 = 5 year.
Q. No. 32:
The ages of Shivali and Tanisha are in the ratio of 11:7 respectively. After 8 years the ratio of their ages will be 15:11. What is the difference in years between their ages ?
Answer: D According to question, (11x+8)/(7x+8) = 15/11 => 121x+88 = 105x+120 => x= 2 Difference in ages = 15*2 - 11*2 = 8 years.
Q. No. 33:
Five years ago, Bina's age was three times that of the Arti. Ten years ago, Bina's age was half that of Chitra. If c represents Chitra's current age, which of the following represent Arti's current age ?
Answer: B Let the Bina's current age = x. Arti's present age = y Then, (x-5) = 3(y-5) x-5 = 3y-15............(i) Again, x - 10 = 1/2 * (c-10) x = (c-10)/2 + 10............(ii) On putting value of x in equation (i) we get, y = (c/6) + 5.
Q. No. 34:
The ratio of ages of a father and son is 17:7 respectively. 6 years ago the ratio of their ages was 3:1 respectively. What is the father's present age ?
Answer: B Le the present age of the father and son be 17x years and 7x years. According to Question, (17x-6)/(7x-6) = 3/1 => x = 3 Father's present age = 17x = 51 years.
Q. No. 35:
If 1 added to the age of the elder sister, then the ratio of the ages of two sisters becomes 0.5 : 1, but if 2 is subtracted from the age of the younger one, the ratio becomes 1:3, the age of the younger sister will be ?
Answer: B Suppose that age of elder sister be x year, and younger sister be y year. Then, y/(x+1) = 0.5/1 = 1/2 => x-2y = -1 ............(i) Again given, (y-2)/x = 1/3 => x-3y = -6............(ii) From both the equations we get, x = 9 and y = 5. So, the age of younger sister is 5 years.
Q. No. 36:
On a scale that measures the intensity of a certain phenomenon a reading of n+1 corresponds to an intensity that is 10 times the intensity corresponding to a reading of n. On that scale the intensity corresponding to a reading of 8 is how many times as great as the intensity corresponding to a reading of 3 ?